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Bats played role as a reservoir host of protozoan blood parasite. The objective of this study was to examine the effects of haemosporidian parasite infection and gender on white blood cell (WBC) count of Asiatic lesser yellow house bat (Scotophilus kuhlii) in Muang district, Nakhon Phanom province, Thailand. Forty four adult bats with both sexes and weighing between 17-25 grams were collected their blood samples. Slides of blood smear were stained with Wright-Giemsa stain and observed under a light microscopic. The results showed that the highest percentage of WBC count was seen in neutrophil (55.10±15.79) whereas eosinophil (0.33±0.57) and basophil (0.32±0.56) has the lowest count. The differential WBC count of adult female and male were not different (P>0.05). Similarly, the percentage of WBC count were not different (P>0.05) between positive of infection and negative of infection group. Base on thorough microscopic examination of blood smear, this study observed that prevalence of blood parasites as Haemoproteidae family was 11.36 % (5/44). In conclusion, the results of present study found that an infection of haemosporidian and gender of Asiatic lesser yellow house bats had no effects on WBC count.
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